Conversion method
Vacuum electromagnetic waves only: frequency × wavelength = 299,792,458 m/s exactly. Wavelength in a material needs its phase velocity; this is not a sound-wave converter. Enter a positive value.
nm = 299792458000000000 ÷ ((x) × 1)
10 Hz = 2.997925e+16 nm.
| Hz | nm |
|---|---|
| 1 | 2.997925e+17 |
| 5 | 5.995849e+16 |
| 10 | 2.997925e+16 |
| 25 | 1.199170e+16 |
| 50 | 5.995849e+15 |
| 100 | 2.997925e+15 |
Unit definitions and sources
Vacuum electromagnetic waves only: frequency × wavelength = 299,792,458 m/s exactly. Wavelength in a material needs its phase velocity; this is not a sound-wave converter. Enter a positive value.
| Unit and system | Use | Definition | Relationship |
|---|---|---|---|
| Hertz (Hz); si | Common units | Hertz: base (hz) = value × 1. Common use: Frequency / Wavelength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Vacuum wavelength in nanometers (nm); si | Common units | Vacuum wavelength in nanometers: base (hz) = 2.99792458e+17 ÷ value. Common use: Frequency / Wavelength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Kilohertz (kHz); si | Specialist units | Kilohertz: base (hz) = value × 1000.0. Common use: Frequency / Wavelength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Megahertz (MHz); si | Specialist units | Megahertz: base (hz) = value × 1000000.0. Common use: Frequency / Wavelength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Gigahertz (GHz); si | Specialist units | Gigahertz: base (hz) = value × 1000000000.0. Common use: Frequency / Wavelength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Terahertz (THz); si | Specialist units | Terahertz: base (hz) = value × 1000000000000.0. Common use: Frequency / Wavelength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Vacuum wavelength in meters (m); si | Specialist units | Vacuum wavelength in meters: base (hz) = 299792458 ÷ value. Common use: Frequency / Wavelength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Vacuum wavelength in micrometers (µm); si | Specialist units | Vacuum wavelength in micrometers: base (hz) = 299792458000000.0 ÷ value. Common use: Frequency / Wavelength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Vacuum wavelength in centimeters (cm); si | Specialist units | Vacuum wavelength in centimeters: base (hz) = 29979245800.0 ÷ value. Common use: Frequency / Wavelength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
Sources: NIST: SP 811 Appendix B.8: conversion factors; BIPM: SI prefixes
Precision of frequency / wavelength conversions
All 9 frequency / wavelength units convert through Hertz (Hz). 9 have an exact defined relationship to the base unit and 0 are conventional or measured values. Results and the tables on this page come from the same engine, so a table value can be checked against the converter directly.
Standard display shows up to six decimal places, switching to scientific notation for very large or small values. Calculation uses JavaScript binary floating point independently of display rounding, so extra digits are not a claim about measurement accuracy. Each unit lists its own source; a citation records where the definition comes from, not an independent review. See Conversion methodology for the review and correction process.